#### 1. 查看所有可用的命令 --- **以下兩種命令效果相同** ``` composer ``` ``` composer list ``` ![](https://img.itqaq.com/art/content/4eb13777cf1a97f8a62f64354ddd01fb.png) #### 2. 查看某個(gè)命令的幫助(命令參數(shù)) --- **查看 `composer require` 命令的幫助** ``` composer require --help ``` **`--help` 可簡(jiǎn)寫(xiě)為 `-h` ** ``` composer require -h ``` ![](https://img.itqaq.com/art/content/b88c7568b3732c70302fa3c48c132513.png) #### 3. 縮略名調(diào)用命令 --- ``` 前提是這個(gè)縮略名具有唯一性,不會(huì)混淆 ``` 例如 `composer list` 簡(jiǎn)寫(xiě)為 `composer lis`